I use Microsoft Security Essentials too, is good
I used AVG for 1 year now (crack serial, you may find it on internet, they didn't block that key
) and I only have only one problem last month when ZeroAccess rootkit bypass my AVG and hide on my computer, but ComboFix help my alot, other than that, I dont have any other problem with AVG, with high detection on RAT/KEYLOGGER, and use less resource on PC..
I also have experienced with other antivirus like Kaspersky, Bitfender, Avira, Microsoft Security Essential..
The largest trauma I have is sality worm infect my computer while I used Avira, and the joke is, avira main binary also get infected by that virus, so I lost many of important data,
If free antivirus, maybe you can get AVG Free, also have high detection in virus,
It you choice, you are the one who choose better antivirus
but for me, AVG is the best antivirus I ever use..
Kaspersky was the best Antivirus i've used for just a short term
i used Kaspersky for great security
I like to use kaspersky but i cat find key files so i, use comodo. but i dont believe at that antivirus can protect my computer against real hacker.
Comodo antivirus, i dont see it on the list. On my Debian install i use no antivirus software.